DE1401684A1 - Heat exchange device and material treatment process - Google Patents

Description

Heat exchange device and material treatment requirements The present invention relates to heat exchange with pular or granular materials, particularly the cooling of such materials in fluidized beds.

The heating and cooling of powdery or granular materials in fluidized beds has been complicated by several problems, one of which is short-circuiting of warm material via the cooler to the outlet or discharge belongs, furthermore, uneven or aimless fluidization as a result of disturbance or obstruction the s fluidizing air flow through heat exchange surfaces or parts that in that fluidized bed are embedded, blockages by accumulations of. oversized Materials and coating the heat exchange surfaces with the material.

Fluidized heat exchangers, which have been deciphered so far, have devices and combinations of overflow and underflow weirs within horizontally extending ones Chambers, vertically extending chambers and various types of heat exchange surfaces, e.g. hollow tubes. However, none of these previous facilities turned out to be considered fully satisfactory. With the present invention, these disadvantages are eliminated in a simple manner by a method and a device for heat exchange in fixed a fluidized bed in which the heat transfer surfaces pass through the movement of the material along these surfaces in a clean, coating-free manner State are maintained, the material movement can be controlled so that Changes in operating conditions are compensated for.

-In general, the preferred embodiment of the facility according to the present invention an elongated, preferably upright housing with one material inlet and one a considerable distance apart Outlet auf0 The material that is involved in heat transfer is in the housing held in a fluidized state. Between the inlet and the outlet and in @ the space occupied by the fluidized material, the housing with a A plurality of heat transfer members are provided which have extensive heat transfer surfaces, e.g. have ribs, fins or wings. The heat transfer members take one large part of the volume and cross-sectional area of the housing and extend substantially longitudinally between the inlet and the outlet.

Also are means of maintaining a relatively high Speed of the material provided along the heat transfer surfaces, the formation of coatings or any other structure of the material on them To prevent surfaces.

Further features, advantages and possible uses of the new invention result from the accompanying descriptions of exemplary embodiments and from the following description.

1 shows a vertical section of a fluidized cooler according to the preferred embodiment of the invention, Fig. 2 is an enlarged horizontal Sectional view of part of the cooler along the line 2-2, FIGS. 1, 3 an enlarged horizontal cross section of a Wärpie exchange member, Fig. 4 is a vertical sectional view of the lower part of one of the heat exchange members; after the line 4-4 der-Bige 3, Fig. 5 is a vertical sectional view of the discharge line of the fluidized cooler according to FIGS. 1 and 6, a horizontal section taken along line 6-6 of FIGS. 5, 7 is a schematic view of a preferred one Plant with the Kähler, Fig. 8 is a cross section of the lower end of a modified one Embodiment of the heat transfer element, Fig. 9 is a vertical section the line 9-9 of Fig. 8, Fig. 10 is a vertical section through the upper end of the heat transfer member 8, and its associated parts, Fig. 11 is a vertical section of a modified embodiment of a cooler according to the present invention, Fig. 12 a vertical section of a further modified embodiment of a cooler according to the invention, Fig. 13 is a horizontal section along the line 13-13 of Fig.1 @, 14 shows a vertical section of a modified embodiment of the cooler according to FIG the ne @@ n invention, for a T $ f <'rm? os: iaj, jt: <gfl, jj,%; j Fig. 15 a Horizontal section along the line 15-15 in FIG. 14; FIG. 16 is an enlarged view egg. Ya 1'-e - s from o:. One of the Beldfungsrohre according to Fig. 15.

Figures 1-7 showing a preferred embodiment of the new.

Invention show that in a fluidized cooler for hydraulic Cement is realized show a cooler @ in geac.hl-s 1; 4'i t:.-Nq-i 'lutd¼ai $' - t @ n Manufactures »i) .1e an air-flushed vagina 8a I agree for this credit any ar @ of M @ hle or S @@ eide @ can be used.

The fluidized cooler has a vertically elongated container or a housing 1, which can have any appropriate cross-sectional shape, and at The preferred embodiment illustrated is a cylinder. The housing 1 has a material inlet 2 at its upper end and in its lower region a material outlet 3. A gas-permeable base 4 is adjacent to the material outlet 3, which forms a bottom in the housing and slopes downwards towards the outlet. Of the Gas-permeable soil is preferably made of filter stones or the like, heat-resistant Material formed or, if the temperature permits, a tightly woven one Be textile structures. You permeability of the soil is preferably over its whole v area so g evenly wiX possible. The bottom 4 is from the bottom wall 5 of the Housing spaced to provide a filling chamber c 'therebetween.

An air or gas inlet 7 is provided in the bottom wall 5 to fluidizing air or gas under pressure into the filling chamber 6, which then flows upward through the gas-permeable bottom 4 to the overlying Material to fluidized air which extends from the upper surface of the ma @ erial separates, is through a vent port 8 in the upper area of the housing carried out.

A conical distributor hood 9 is arranged outside the inlet 2, around the emerging heat material u distribute and in the shape of an annular, to cross after the downward flowing stream. Air that is below the manifold 9 rises, moves outwards and flows through the ring-shaped material flow, when it comes off the outer belt of the manifold and onto the bed of material in the container falls. A plate 10 at the top of the distributor 9 blocks or delays the flow of material something through the inlet 2 and contributes to the distribution of the material bie.

A plurality of heat transfer members extend from the Upper wall 12 of the housing downwards in a substantially symmetrical arrangement, preferably in concentric rows, with respect to the cross-sectional area of the Housing, as well as in a sufficient number, around a relatively small cross-sectional area between the heat transfer members n open to have a flow of material through to allow the housing through.

Each heat transfer member 11 has a Parr concentrically arranged inner and outer tubes 13 and 14 on (Fig. 3 and 4), both of which extend through the Upper wall 12 extend through it. Las is outer tube 14 / with a plurality, of extending outward are the rniiiusitn, heat-conducting ribs 15 or the like provided, the ribs 15 extend from the lower end of the tube 14 vertically to a tell something below the upper wall JA Jes container 1. A closure part in the form a downward facing cone is for the lower end of each outer tube 14 intended. The cone 16 is used; the distribution of air flow evenly around the Surface of the links 11 around a short circuit of parts of the air lengthways to @ er @ indian one side of the limbs.

The i @@ eren pipes 13 of the @ ärm @ ibertragunge @@@@ the @@ end briefly in front of the lower ends of the outer tubes 4 and are provided with a pair of legs 17, as best seen in Fig. 4, the between the. lower end of the inner Pipe 13 and the upper part of the closing cone 16 maintain a gap 18, Iie legs 17 also serve as a spacer to the concentric position between the inner and outer tubes 13 and 14 aitfrocht at their upper ends the inner tubes 13 extend through end walls or caps 19 on the outer Tubes 14, and thereby form means for the introduction of a heat exchange medium.

The lower ends of the heat transfer members ii can, if washed, secured by appropriate bracing in the correct spaced position to each other be. the various heat transfer elements can be used for the penetration Flow of a heat transfer medium, connected in series or in parallel depending on the request be. Fig. T shows that the heat transfer members are interconnected in groups are to provide a series flow of the heat transfer medium through each group of the links To enable this, the outer tubes 14 are adjacent pairs of Heat transfer members interconnected by tubes 21 and the inner tubes 13 of the adjacent links of adjacent pairs by means of a iii form a inverted U-shaped part 13 am connected to each other. i this connection of the tubes, the heat exchange medium supplied through the inlet tubes 13 comes first down through the inner bore to the bottom of the heat exchanger to which the pipes are connected and through the gap 18 into the outer pipes 14. The heat exchange medium then flows upward through the outer tubes and is passed through the connections 21 into the outer tube 14 of a second heat exchanger carried out. In the second heat exchanger it flows downwards through the outer tube 14 through and up through the inner tube 14 to then on the upper End of this tube to be discharged into one of the parts 13 in an inverted U-shape, from where it flows to the inner tube of a third heat exchanger. This series river continues until the heat exchange medium is discharged through the pipe 13b.

The material outlet 3 is at the lower end of a discharge line 22 in connection. This event includes a lower, thigh 23, which extends from outlet 3 outwards and upwards to the lower end of a vertically extending leg 24 which extends at its upper end into an overflow leg 25 empties. The vertical leg 24 and the overflow leg 25 can be separate Lines or, according to FIGS. 5 and 6, compartments of a single discharge line 22 be.

The level of the overcurrent @ from the vertical leg 24 into the overflow leg 25 determines the level of the material in the container 1, but can, thanks to the wall break i vertical leg 24 R level of the material in housing 1 slightly above the Pagel the overflow edge 24a of the opening 24b from the vertical limb 24 into the overflow limb 25 lie.

Sometimes it becomes w2nschtenswe @@ b @@ unden, the pagel of the overflow edge 24a to change the level of the material in container 1 accordingly. For this purpose, the common wall has between the vertical leg 24 and the discharge handle 25, a series of interchangeable or removable loose plates 24c and a sliding plate or weir 24d, which @ has the overflow edge 24a, dis can be adjusted vertically by means of a handle 24e. The hand @ abe 24e can be held in its set position by any suitable means will. The plates 24 @ and the plate or weir 24d are guided by means of guides 24f held in place on the inside by opposing walls attached to the conduit, by removing or adding plates 24c or by Exchange of larger plates for smaller plates or vice versa and by the Application of the sliding plate or the weir 24d can be applied to the overflow edge 24a on each desired level can be set.

Instead of the means for adjusting the level just described the overflow edge 24a can also be any other means of lifting or See lowering such an edge. The discharge line 22 is preferably connected its upper end is provided with a vent port 22a to allow gas to escape let the fluidized material escape at the top of the line.

At the material outlet 3 is the lower leg 23 of the discharge line 22 is provided with a collecting connector 26 which is open to the inside of the leg 23 and closed to the atmosphere by means of a valve 27, the valve 27 can be opened periodically to show accumulations of oversized material, tubers or the like or foreign objects.

At the bar) 24 is the lower wall of the lower swing 23 with einom fan 28 is provided, which is below the vertical leg 24, in order to ventilate Air up hindur @@@@ l @ s @@@.

The air passes through the line 22 to the top and escapes through an exhaust nozzle 29 in the upper end of the line, as Fig. 7 best shows, takes the cooler C passes material from the coarse waste outlet 31 through its inlet 2 of the air-flushed separator S, and carries the waste after being cooled is, through its outlet 3 and the discharge line 22 through into the Finlaß der Flow-through mill M, e.g. a cement fine mill. read from the mill Material then reaches the inlet @ 32 of the separator S. Under the influence of a (not illustrated) wind turbine, s4 which can be a structural component of the separator the separator classifies the material in rough and @one Fractions and the air carries the coarse waste through an air outlet 33 through outlet 31, and the desired fine fraction of the finished product l through a product outlet 34 therethrough. Where it is desired, the finished, cement product discharged through outlet 34 is fed to a second cooler before it is used or saved.

In operation of the device according to FIGS. 1-8 for cooling hydraulic At the moment the Mühel M, the separator S and the fluidizing air flow become the cooler C1 started and a chart, au Zemontklinder from a UpeiohXsr or a (not illustrated) first clinker breaker @ for the purpose of grinding to the grinders delivered. . The grinding of the cement clinker generates considerable heat, which subsequently must be removed. Theoretically it is generally assumed that the greater part the one mill of the kind commonly used for the final grinding of cement @e performance in the form of heat generated by abrasion and impact is lost.

The warm cement reaches the separator E from the end of the effort M and from there to the cooler C. This process continues until the temperature is the Material in the cooler is above the dew point of the fluidizing air to cause condensation to avoid moisture on the surface of the heat transfer members 11.

When this state is reached, the flow of the cooling medium begins, preferably water, through the heat transfer members 11 the warm waste, the separator at a temperature on the order of z. : B. 65.5 to Leaving 149 ° C, pass through inlet 2 of the cooler onto the plate 10. The free flow of the warm waste in the KUliler is controlled by this plate 10, of any uneven flow or excessive Flow along one side of the outlet tube from continuing within the cooler0 Las material is away from the edge of the plate 10 and below the circular bottom Edge of the inlet 2 as an annular stream to the distributor cone 9, as well as from lower edge of this distribution cone down to the main mass of the fluidized Cement led in the cooler.

The cement, which has pseudo-hydrostatic properties similar to a few of a liquid strives for a point of equilibrium, in other words, a constant level or mirror. Therefore, part of the fluidized bed flows through the outlet 3 and up into the vertical leg 24 of the discharge line. The air supply to the fan 28 is regulated so that it fluidizes the material above that in leg 24 to some degree causes a lower density of the fluidized mass is caused therein, such that the column or the hydrostatic Bruok the fluidized mass in the container is the less dense fluidized material brings into the leg 24 to rise and overflow into the leg 25, of where it is held.

In normal operation, namely as long as the supply of air to the fan continues, cement is discharged from the bed.

Therefore, the new cement, which by means of the cone on the upper Surface of the fluidized bed has been distributed, fluidized and with your ESett is mixed and descends in the tank as part of the fluidized bed. As the cement flows down through the cooler, it causes constant stirring of the cement, as a result of fluidization of the bed, provides effective heat transfer between the cement and the heat transfer members ii as the individual particles of the cement causes different surfaces of the heat transfer members to touch. Preferably the speed is increased ability of dem Housing supplied cement to the speed. / That of the cement through the outlet 3 is discharged through, so tuned that the flow of the fluidized cement through the cooler at a speed of about 90 cm / min. held will. For materials that are sensitive to moisture and tend to touch the Heat transfer surfaces can reduce speeds up to 30 cm / min. In some cases even lower or higher speeds are satisfactory.

Although it should be understood that the cooler according to the present invention is equipped for use in various systems, e.g. for direct cooling of the finished cement @ product is a closed circuit cooling of the pulp discharge to the separator or the waste from the separator while it is returning to the mill, preferable in many cases. @@ the cooler in one of these positions within arranged in a complete circle, it takes up a substantial flow of material, in general the "circulating load", which in terms of weight / hour one to scht @@ l the discharge of the finished product from the mill circuit can.

This substantial material load makes a relatively high speed the flow of material along the heat transfer surfaces possible, in particular since the number and size of the heat transfer members determine the area inside the housing limit through which the materials flow. Regardless of this, it will be a big one Mass of chilled material is kept in the 8sefs, with that developing in the mill Heat is distributed and dissipated within the mass.

When operating a closed circuit and if it is desired, change the particle size of the batch to the mill, e.g. from about 6.5 to about 10 or 12.8 mm, there is a higher proportion of rejects from the separator Cooler. Among those Conditions passed when the level of the overflow edge 24a remains the same, a gradual build-up of the amount of material in the cooler, which, if no correction occurs, - can lead to a state in which the whole system clogs. In order to avoid this eu, the overflow edge 24a is so far lowered as it is necessary to get the desired level of fluidized material in container 1 to be maintained.

When producing hydraulic cement, the desired cooling result is achieved expressed in magnitude of the temperature of the finished cement, As the amount of one Mills generate heat for a given discharge rate of the finished cement is relatively constant, causes the high circulating load of partially cooled Material just returning to the mill inlet that all of the heat input of the Mill is distributed over a large mass of material, creating a lower actual Temperature rise of the material is caused as it b @@ a @ l @ ineren mass recycled or recycled material would occur. That's why it is when the cooler according to de @@@@@ lying invention to one of the preferred Sta @@ en is used in a circle, not necessary, the large Umlaufslas @ @@ a very To cool a low temperature, as only the removal of all heat from there is required to for Absorb @ io @ the mills. to provide warmth through the great mass, Thus 3icil leaves a lower temperature differential between the material and the cooling medium maintained while after the desired result is achieved. At the same time prevents the temperature of the material in the Mill coating the balls or other grinding media through the material and, in the case of hydraulic cement, the wrong settling, that in the case of overheated material is encountered.

Ii e modified embodiment of the heat transfer member that FIGS. 8-10 show that w @ i @ t nu @ a single one pipe 14 @ with longitudinal and radially extending heat-conducting ribs 15 ' or the like on its outer surface. A transverse partition as divided the interior of the tube 14 in a pair of channels 37 and 38 and extends from the upper one End wall or cap 19 @ the tube (Fig. 10) to a point that is at a distance from the lower end wall 39 (Fig. 9) to provide a gap 18 'therebetween to form the flow of the heat transfer medium. At its upper end above that Upper wall 12 'of the housing, the R @ hr 14' is connected to an inlet pipe 4.1, which communicates with the channel 37 and an outlet pipe 42, as it in turn connected to channel 38. iie heat transfer members 14 'can be parallel or connected in such a way that they work in series.

In operation, cooling fluid is introduced into the channel through inlet tube 41 37 and flows through this down to its lower end. The cooling fluid then flows through the gap 18 'below the partition 36 and up through channel Q to outlet tube 42 The modified illustrated in FIG Embodiment of the cooler has a housing la with a material inlet 2a in its Top wall 12a. and a material outlet 3a on opposite sides. A ga @ permeable Bottom 4a extends over the lower area of the housing and forms together with the B @ denwandung 5a of the housing a filling chamber 6a. Air or gas becomes the Filling chamber supplied via a gas inlet 7a, and passes up through the daxin gas-permeable bottom 4a to fluidize the powdery material in the housing. A vent 8a extends from the top wall 12a and does this the fluidized material escaping from the housing to the outside. A majority of heat transfer members 11a is like that inside the case arranged, similar to that shown in FIG.

A material inlet pipe or tube 45 follows from the material inlet below and ends at its lower end at a point at a distance from the gas-permeable Bottom 4a to form an annular distribution mouth 46 through which the material is carried through into the housing. The lower end of the tube 45 is through an inverted conical part 57 constricted, which the material within of the pipe throttles or restricts in order to ensure an even delivery to the outside the annular mouth 46 through into the housing to facilitate.

In operation of the device according to FIG. 11, the flow of the fluidizing gas introduced upward through the gas-permeable bottom 4a. The flow of the cooling fluid through the heat transfer members lia is either initiated before or after the initiation of the material flow through the housing, The material passing down through the inlet pipe 45 is partially passed through the restricting frustoconical part 47 delayed, whereby the flow of material stabilized and any short-circuiting along one side of the pipe is prevented. This causes the material to flow through the annular opening 46 into the free space measured within the housing. the material in the housing is fluidized and, as additional material is added to the housing, up along the heat transfer members 11a is displaced until it ultimately overflows through the material outlets 3a and out the housing is discharged.

The modified embodiment of the cooler according to FIG. 12 and 13 has a housing 1b with a material inlet 2b and one Material outlet 3b and a plurality of heat transfer members lib similar to those according to Figures 1 and 11.

A material inlet chamber 50 arranged on the upper wall 12b can be seen in communication with the inlet 12b via a collar part 501.

Material fed to the housing is passed through a tube 50a to the inlet chamber forwarded. A gas-permeable floor 4b extends over the lower part of the Housing and is located at a distance from the bottom wall Sb of the same, uni one To form a series of bulking chambers, as will be described in more detail below.

The gas-permeable soil is of the neighborhood of the perimeter of the Housing down to a lower level or floor 51 in the neighborhood @ the center of the case inclined. A circular wall 52 closes the space between the bottom wall 5b and the underside of the lower level or floor 51 of the floor to form a central filling chamber 53. Four radially extending walls 54, 55, 56, and 57 surround the central filling chamber 57 and divide the tree in between the gas-permeable bottom 4b and the bottom wall of the housing in four quadrants or outer filling chambers 58, 59, 60 and 61 of sector shape. The outer felling chambers are with their own casein inlets 62 or 63 resp.

64 and 65, respectively, while the central filling chamber 53 has a separate one Gas inlet 66 has.

Eiu gas lift pipe 7 extends from a position above and inside Distance from the lower tier or surface 51 of the permeable floor 4b upwards through a distribution cone 9b, which is arranged below the material inlet 2b is, further through the inlet chamber 50 into a separation chamber 68 with a Exhaust nozzle 69o The lower end of the gas lift tube widens outwards, to form a frustoconical part 70 which is the discharge end of a nozzle tube 71 records. The design of the gas lift pipe and the nozzle is American See U.S. Patent No. 2,509,983. A discharge tube 68 'extends from the chamber 68 for the discharge of material that is thrown there through the gas lifting tube 67 is promoted.

Form at the point where the material passes through the material inlet 2b the gas lift pipe 67 and the collar or Hls 50 'have an annular space 72 through which. through Material is conveyed from the inlet chamber 5C to the distributor cone 9b. operational the device according to Figures 12 and 13 is a flow of fluidize @ the gas set in motion and maintained upwards through the drained soil, as will be described further below. The flow of cooling Fl Fluidum through the heat transfer member 11b, either before or after, as desired Start of material flow through the housing.

The flow of material into the inlet chamber 50 is partially manure Size of the annular opening 72 and delayed by the cone @@, whereby the Material flow stable view and a @@@@ close the material along one side entwender de @ @@ @@@@ g 72 or the housing prevented wi @ d, the material succeeded. as a ring-shaped stream through the ring-shaped opening @@ and @@@ d da @ ach means of the cone 9b evenly over the upper @ Ohe @ f de @ e of the bed of fluidized Material in the case ver @@ il @ Air or gas is fed through the central filling chamber 53 sewie @ i @ lower tier or surface 51 and the nozzle pipe 71 fed through. That Material above the lower tier 51 is fluidized by means of the air flowing through up the floor through s s @ flows and rises in the Gaehubrohr 67, where they one Seeks equilibrium point or a stable level or level. Lie in The air entering the lifting tube Q7 from the nozzle 71 causes further ventilation, expansion and reduction of the density de @ Materials in the lifting tube. D "pillar" of the material bed in the housing - around the gas lifting pipe hexum drives additional material into the un-, de of the lifting tube and causes the little dense material in it, move upward into the sheath chamber 68. in this chamber separates. themselves the air from the powdery material and escapes through the vent 69, while the material by gravity or other means or measures by the Discharge pipe 68 'is discharged through.

Assume that there is an essentially constant supply of material takes place in the upper end of the container ib, the level of the material within control of the container by the amount of gas that passes through the nozzle 71 is introduced. An increase in the amount of gas through the nozzle 71 into the lifting tube lowers the density of fluidized material in the hub tube and increases the density difference between the fluidized material in the lifting tube and in the main container surrounding the lifting tube.

Lies leads to a greater flow of material up through the hub tube through a @ as to a corresponding lowering of the level @ of the material in the container. Similarly, a decrease in the amount of the flow through the nozzle pipe 71 results introduced air to an increased density of the fluidized material. in the lifting tube as well as a decrease in the density difference between the fluidized material in the gas lift pipe and in the container surrounding the pipe. This in turn leads to a smaller flow fluidized up through the gas lift pipe and lifting it up Fluidized material level in the container.

The air flow rate or / the amount of air or gas per min / qem of the gas-permeable soil in each sector 58, 59, 60 and 61 can be through a Valve means (not shown) regulate the flow rate through the gas inlets 62 or 63 or 64 or 65 to regulate. The amount of flow through each sector can gletch be, or can be uneven in a compatible way, with the higher air flow in the circuit or periodically to different vectors emotional; is, as the American patent no.

2 844 361 can be found in more detail.

Gravel control Via the ventilation of different zones of the material bed allows the material thickness and material speed to be controlled in the various Zones. Therefore, when problems such as a local zone of dense or agglomerated material occur, the air flow can be temporarily adjusted so that that there is a high material turbulence or a high material velocity in the desired zone evokes. Though the intermittent turbulence or high speed in terms heat transfer cannot be the most efficient; they opt for a periodic Kicking the heat transfer links or breaking off areas of dense material use. After the heat transfer links of a section through high ventilation have been cleaned ', this section can again with @ ine @ for wi @@@ ame heat transfer sufficient air flow rate can be operated while, another sector den receives higher air flow.

As shown in FIGS. 14 and 16, there is another modified embodiment of the present invention, which is particularly useful for a cast heat transfer medium suitable, a housing ic with a material inlet 2c in its lower region and a material outlet 3c in its upper part on 4 a screw conveyor 75 and a star conveyor 76 controls the flow of material through inlet 20 and outlet, respectively 3c through. Is the unit for cooling extremely warm powdery materials used, or for any other desired purpose, is an insulation layer 74 provided around the housing.

A plurality of heat transfer members 11c extend therethrough the housing length through with the links common at their opposite ends to an upper pantry 77 and a lower plenum 78 are connected. The heat transfer members 11c have open tubes 14c with a plurality of longitudinally extending ribs 15c or the like extending from extending radially away from the surface of the length of tube dif is located within the housing.

Instead, heat transfer members can also be used, such as they are illustrated in the other figures. Three ring-shaped ventilation pipes 79, 80 and 81 are on different vertical zones or floors around the outer one Heat transfer members arranged. A corresponding group of inner annular ones Ventilation pipes 79 ', 80' 81 'is adjacent to the pipes 79 and 80 and 81, respectively, ange @ rd @ et and is in contact with them via intermediate tube 82. The @ el @ f @ ungsphre are uniform with through holes 89 on in lower sides or in other appropriately perforated to allow air or gas to enter the surrounding material allow. Preferably, the ribs 15c, as for example at 83, are grooved or interrupted, in order to adjust the ventilation pipes close to the heat transfer pipes 14c. e G @ uppender lie pipes 79, 80 and 81 take air or @@@ Illustrate each through pipelines and valves 84, or 85 or 86 from a @ ich @ V @@ Source on. the delivered the air or @ a @ @ird out of the housing by means of a Cyclone fan @@ @@ ge @@ gen, the dust in front of the gases is removed and passed through @en @ all @ eh @@@@ l 88 @i @@@@@@ leads back to the @interialbett.

In the operation of the direction according to FIGS. 14 to 16, material becomes Delivered into the housing by means of the screw conveyor 75 and supplemented by means of the Star conveyor 76 at the top removed from the bed. Fluidizing Air or gas is passed through the openings 89 of the ventilation pipes 79 to 81 and 79 to 81 'fed to the material in the container zv, fluidize, unci, escapes then from the container through the cyclone vent 87. The amount of air intake and therefore the degree of fluidization at the various vertical zones can be determined regulate by the valves 84, 85 and 86. A gaseous heat transfer medium, such as cold air, gets into the pantry 77 as well as through the heat transfer members 11c inserted and withdrawn from the collection chamber 78. Instead, if desired, the gaseous medium takes an opposite path upwards through the heat transfer members follow. In addition, if desired, n the device n3 oh dci Figures 14 up to 16 liquid heat exchange media are used, manifold changes in the Totality as well as the @ iaze @ he @en of the trainings according to the different implementation of heat exchangers according to the present invention @ a Lich without @ierdurch the meaning and scope of de @ @r @@@@@ needs to be deviated from

Claims (1)

Claims 1. Heat exchange device for powdery material, characterized by a container for receiving the powdery material, wherein that part of the container that receives the material and in which the material is treated, an inlet adjacent to the one inde of the container for the introduction of the material and an outlet adjacent to the other end for the discharge of treated material, further by means adjacent the bottom of the container, for introducing a fluidizing gas up through the material on the container flows further through a plurality of heat exchangers within to fluidize it of the container, which are arranged at a distance from the container walls and from each other are to create spaces for the material to be treated, and by means to cause a flow of heat exchange medium through the heat exchangers. 2 @ heat exchange device according to claim 1, characterized in that that at least part of the bottom of the container is gas-permeable, a filling chamber arranged immediately below the gas-permeable part of the bottom of the container and the filling chamber has an inlet for gas flowing in and out of it up there through the gas-permeable part of the bottom of the container as well as in overlying powdery material flows into it. 3o heat exchange device according to claims 1-2, characterized in that that the outlet of the container is opposite to the inlet of the container side is arranged. 4. Heat exchange device according to claims 1-3, characterized in that that the discharge outlet for treated material is adjacent to the bottom of the container is provided and further an upwardly extending discharge line is present, which is in communication with the discharge outlet, and then, means are provided to introduce a gas into the lower part of the discharge tube, to facilitate a flow of the powdery material coming from the part of the container in which is treated, is discharged upwards through the pipe that near its upper end has a discharge outlet O 5, heat exchange device according to Claims 1-4, characterized by means for adjusting the height of the overflow edge of the discharge outlet of the pipe0 6. Heat exchange device according to claims 1-5, characterized in that the means for adjusting the height of the overflow edge have a vertically adjustable weir, and an upper box part of the weir forms the overflow edge of the discharge outlet of the pipe, 7. heat exchange device according to claims 1-5, characterized in that / means for adjusting the Bohet -the overflow edge of the discharge outlet of the pipe a plurality of removable plates having a portion of one side of the pipe adjacent the overflow edge of the discharge outlet of the pipe. '8th. Heat exchange device according to claims 1-7, characterized thereby draws that each heat exchanger has an outer tube and a. .inneres tube within the outer tube, with at least one end of the outer tube is closed, while the inner tube, into the outer tube extends and, has an open end that is at a certain distance from the The closed end of the outer tube ends, and also the outer ears certain Heat exchangers, adjacent their ends, remote from the closed ends, with one another are connected, and the inner tubes of certain heat exchangers ore at their ends of their open ends, interconnected, with the connections between the outer Tubes and the inner tubes are such that a flow of in a heat exchange @ introduced heat exchange medium in series through a plurality of heat exchangers is guaranteed. 90 heat exchange device according to claims 1-8, characterized in that that each heat exchanger has a tube with at least one end closed is, further a septum that extends across the pipe and in one Distance from the closed end ends to make a pair with-each other in each tube to form communicating chambers, the ends of the tubes of certain heat exchangers, far from the closed ends, are connected to one another in such a way that one of a chamber a pipe fed heat exchange medium in series through the respective chambers the connected pipe flows. 10 O. heat exchange device according to claims 1-9, since by gek draws that. the inlet into the container runs through its top wall, and a Distribution element is arranged below the inlet to prevent material entering to be distributed outside over a larger area of the container 11. Heat exchange device according to claim 10, characterized in that the distributor is conical and central is arranged below @ the inlet pipe 12. Heat exchange device according to claims 1-11, characterized; 5 that the inlet is a pipe that extends from the Top of the tank down to a position near the bottom of the tank extends, and the tube has an open lower end which is connected to that part of the Container is in communication, velcher receives the material. 13. Heat exchange device according to claims 1-12, characterized in that that a line is provided which extends from a position adjacent but in the Distance from the bottom of the container extending upward through the container the lower end of the conduit being open and the discharge from that part of the container forms in which material is treated to graze, furthermore the Line an opening adjacent to its upper end for the discharge of material has, and that a nozzle tube is provided which has an opening, di. passing through Directs gas upward through the duct to create an upward flow of material through the line to facilitate. 14. Heat exchange device according to claims 1-13, marked @ through a material inlet chamber above the container forming an upper portion of the conduit surrounds below the opening therein for the material discharge, further through Mi @@@ for feeding material to the material inlet @ ammer, and ei @@ n the line surrounding, at a distance from it @@ K @ agen, whose upper end with the material inlet chamber is in Vorbind @@, while the lower end is connected to the container @n and the material inlet for the container bil @@ 15. Heat exchange device according to Claims 1-14, marked @@ t by a separating chamber with which the, upper End of the line adjacent opening connects, wherein. the vaginal chamber in the upper part has an exhaust nozzle for the escape of gas, which is from the Separates material in the Scheidekam mer, as well as a material discharge, which with the Vaginal chamber is in communication and leads away from her. 16. Heat exchange device according to claims 1-15, characterized in that that the gas-permeable medium essentially forms the entire width of the container, and the filling chamber in a multitude of unrelated ones Share @@@@ shares is, with one of the parts below the open @@@ ers end or line is present. and that means of supplying gas independently to each of the parts are provided. 17. Heat exchange device according to claims 1-16, characterized in that that the gas-permeable organ essentially forms the entire bottom of the container, and the filling chamber @n a plurality of not with. related " Dividing is divided, and that, means for supplying gas independently to each of the parts are provided. 18. Heat exchange device according to claims 1-17, characterized in that that the means for fluidizing the material in the container with at least one a ring-shaped ventilation pipe provided with a passage opening in the container, which surrounds the heat exchangers therein, and the means for supplying gas to the Ventilation pipe are provided. 19. Heat exchange device according to claims 1-18, characterized in that that at least a pair of concentric annular ventilation tubes on the same horizontal level and that means for supplying gas to each the annular ventilation pipes are provided. and a mrzabl of heat exchanger @ between the concentric tubes. is arranged. 20. Heat exchange device according to claims 1-19, characterized by a plurality of spaced apart pairs of concentric vent tubes at different levels in the container @ 21. Heat exchange device according to claims 1-20, characterized in that vertically extending thermally conductive Ribs are provided on the outer surface of the heat exchanger, the vertical Connection of at least - some ribs is at least partially interrupted, to form spaces, and that the annular ventilation pipe at least partially is arranged in the spaces. 22. Device for cooling powdery material, characterized by a vertically -arranged container with an enclosing shell as well top and bottom closures, a plurality of thermally conductive tubular Members arranged within the container and extending through it, further by means of circulating a heat transfer medium through the tubular members to lead in the circuit, further by means of a fluidizing medium in the Introduce the bottom of the container, which then upjrts through powdery material in the Container arrives to fluidize the material su, then through-means to be cooled To introduce material adjacent an image of the container and by discharge means at the opposite end of the container for the removal of chilled material. 23. Material cooling system, characterized only by a fine grinding mill, Medium tin supplying material from this mill for the purpose of grinding, a separator, Means for conveying ground material from the mill to the separator for separation of the ground material into two fractions, means for discharging one fraction from the Soheider, a cooler, funds to the other fraction from the separator to To let Kähler get in for the purpose of cooling, as well as funds for the other fraction after cooling in the cooler to get back to the mill for further grinding permit. 24. Material cooling system according to claim 23, characterized in that the cooler has a container that has a space for containing material the separator, with the part of the container that receives the material and in which the material is cooled, there is an adjacent inlet for the material one end and adjacent to its other end an outlet for the discharge of cooled material, further that means is provided adjacent to the end of the container are to introduce a fluidizing gas flowing up through the water at; erial passes through the container to fluidize it, then s that a plurality of heat exchangers within the container is provided by the walls of the container and are spaced from each other to provide spaces for to form cooling material, further that means are provided to prevent the flow of a To effect cooling means through the heat exchanger, the discharge outlet for cooled material is provided adjacent the bottom of the container with a upwardly extending conduit in connection with the discharge outlet, then that means are provided for introducing a gas into the lower part of the discharge tube to facilitate an upward flow therein of the powdery material contained in the lower end of the tube enters, which has a discharge outlet adjacent its upper end and means for adjusting the level of the overflow can of the discharge outlet of the pipe has, whereby when the amount of the cooler fed from the separator Material is increased, the height of the overflow edge of the discharge outlet of the discharge line 25. A method for treating material, characterized in that that the material is ground in a grinding zone, the material into fine and coarse fractions dismantled, the fine fraction separated from the coarse fraction, the coarse fraction led to a plumbing scene, a fluidized bed in the fluidizing zone the coarser fraction formed, the coarser fraction while in the fluidized bed is, cooled, the cooled material from the fluidized bed back to the grinding zone for further grinding, the amount of material that is land is regulated is hated in the fluidized bed according to the rate at which the gross Fraction reaches the fluidizing zone. 26. A method for continuously cooling powdery material, thereby characterized in that a fluidized mass of material is formed like a zone, which extends from the bottom of a vertical container in which a fluidizing means when a plurality of fleas is introduced into the mass, the fluidized mass by conduction of cooled tubulars immersed in the fluidized mass Is cooled, the powdery material continuously in the upper zone of the organs vertically arranged mass promoted, the fluidizing agent from which the flidized Container containing mass is discharged continuously, and the cooled product is continuously withdrawn from the bottom part of the mass 27, method according to claim 25, characterized in that the material with about 90 cm / min. through the cooling zone is passed through. 28. Wärmeaustauscerrohr, characterized in that at least one End is closed, a septum extends lengthways and through the pipe this extends through and ends at a distance from the closed end, to form a pair of interconnected links, further that Means for supplying a heat exchange medium to the two chambers, and means to discharge the heat exchange medium @ from the other chamber are provided,